IoT on AWS and NodeMCU FOR LESS THAN 5 EUROS

June 2016

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About Johann• Tech Evangelist @Stylight

• 15+ years in tech

• In Germany for 2 years

• 7 years in San Francisco doing startups

• Organizer of many meetups

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Tweet me!

@romefort @StylightTech

What are you going to learn?

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• Discover ESP8266/NodeMCU

• Introduction to AWS IoT

• Hands-on

• Connecting a NodeMCU board

• Configuring Arduino environment for NodeMCU

• Installing AWS SDK

• Publishing sensor data to AWS IoT

• Trigger rules to invoke Lambda function

ESP8266

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• Cheap: $2

• Very low power consumption

• WIFI

• Deep-sleep mode

NodeMCU• Micro-usb for flashing

and power

• 3v - 5v: Support Arduino sensors

• Compatible Arduino/Lua

• CHEAP

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You said CHEAP?

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Why?

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• Cheap is good in IoT because it scales

• But no direct support of AWS IoT because no TLS 1.2 module yet in ESP8266

• Hackers always find workarounds

If you just want to play around/prototype

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Introduction to AWS IoT

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• Serverless way to connect your IoT devices and start processing data

• Supports MQTT, HTTP

• Secure - communication through use of X.509 Certificates

• Can connect huge amount of sensors, store and process the data in real-time

AWS IoT Architecture

11source: http://docs.aws.amazon.com/iot/latest/developerguide/aws-iot-how-it-works.html

What’s a Thing?

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• An IoT Device

• Sensors, actuators,

• In our case a NodeCMU board

What’s the Message Broker?

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• Used to securely exchange messages following the publish-subscribe pattern, between IoT applications and Things.

• MQTT to publish/subscribe

• HTTP to publish

• Note: MQTT uses TLS 1.2 which is not available in NodeMCU

• Let’s use HTTP then!

What’s the Rule Engine?

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• Used to process messages and talk to other AWS components like Lambda, DynamoDB, etc

• SQL-Based language to select specific messages to be passed along.

What are Thing Shadows?

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• Devices sometimes go offline

• A Thing Shadow provide a persistent representation of a Thing

• A Thing can sync its state to its Thing Shadow through the REST API

AWS IoT Console

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Hands-on!

June 2016

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We are going to:

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• Create a Thing in AWS IoT

• Publish sensor data from our NodeMCU to update our Thing Shadow

• Have a look at the MQTT Client

• Create a Rule to trigger a lambda when humidity is > 50%

• Publish the data to Slack

The Fritzing

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Create a Thing

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Open Serial Monitor

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MQTT Client

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Creating your Lambda

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Configuring your Lambda

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Write your Lambda

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Questions?

Twitter: @romefort tech.stylight.comRead our blog:

www.stylight.com